/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: yang
 * Date: 2022-05-15
 * Time: 9:25
 */

abstract class A{
    public abstract void func();
    public abstract void func1();
    public abstract void func2();

}

abstract class B extends A{
    abstract public void func3();

}

class C extends B{
    public void func3(){

    }
    public void func(){

    }
    public void func1(){

    }
    public void func2(){

    }

}

public class Main {
    public static void main(String[] args) {

    }
}
